Malicious PDF — malware analysis report

Static analysis result for SHA-256 e715fc81e662a43c…

MALICIOUS

PDF

66.7 KB Created: 2021-10-03 03:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 58aef563ab1b4c1c15356ddbd1cc3bf6 SHA-1: f5ec0dfddd81b3d74bcc9b361c9c985e57cef4e4 SHA-256: e715fc81e662a43c23dd9d776ae124bfe3847afc10fe9f2d55245eb7a9e6cb98
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF is identified as a phishing lure due to its image-only nature and embedded links pointing to compromised websites. The document likely attempts to trick users into clicking malicious links by presenting a visual facade, a common tactic for credential harvesting or malware distribution. No scripts were extracted, but the presence of numerous external URIs suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 66 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://recuva.kr/upload/fck_img/1632815008/file/81499107536.pdf In PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/2bb6db1724237af0b5f253cc01606412/nuratevigat.pdfIn PDF document text
    • https://blokhol.com/upload/files/megex.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/wujuv.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/95094838397.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/jimase.pdfIn PDF document text
    • http://iknow.pl/files/file/nomudavesiji.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/vedenos.pdfIn PDF document text
    • http://186086.com/upload/files/xudevetupos.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/busijapesewajuve.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/zekunimuwatinugivo.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/90152935370.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/59v3mvd5dh15oamo7hl0fnfp2g/96526536685.pdfIn PDF document text
    • http://fjsxsx558.com/upload/files/55590612685.pdfIn PDF document text
    • http://worldwidestationeryholdings.com/files/file/62913336918.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/sapibamu.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/poxaverumukevuvoluxejipi.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/zizenemuzame.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ed7a05792---10474999141.pdfIn PDF document text
    • http://azs-szermierka.pl/zdjecia/fck/file/81661846711.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/fexabiwonimewa.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/juxebagekamozarogotazolid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=rent+in+rollPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7C 9816 bytes
SHA-256: c1e6db7859a023748995aaf6fd674840648c87b5bff1789ce99a9467b3ad3390
font_01_sfnt_off0000c217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC217 14324 bytes
SHA-256: 805bbbd0b4beab6b9a204df973fe73d6d8c66c06935f90165d639257b1e7e36e
font_02_sfnt_off0000e5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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